Conductivity in lead substituted bismuth yttrate fluorites

被引：4

作者：

Borowska-Centkowska, A. ^{[1
]}

Liu, X. ^{[2
]}

Holdynski, M. ^{[3
]}

Malys, M. ^{[1
]}

Hull, S. ^{[4
]}

Krok, F. ^{[1
]}

Wrobel, W. ^{[1
]}

Abrahams, I. ^{[2
]}

机构：

[1] Warsaw Univ Technol, Fac Phys, PL-00662 Warsaw, Poland

[2] Queen Mary Univ London, Sch Biol & Chem Sci, Mat Res Inst, London E1 4NS, England

[3] Polish Acad Sci, Inst Phys Chem, PL-01224 Warsaw, Poland

[4] Rutherford Appleton Lab, STFC ISIS Facil, Didcot OX11 0QX, Oxon, England

来源：

SOLID STATE IONICS | 2014年 / 254卷

关键词：

Bismuth lead yttrium oxide; Neutron diffraction; X-ray diffraction; a.c. impedance spectroscopy; Transference number; XpS; RAY PHOTOELECTRON-SPECTRA; OXIDE-ION CONDUCTORS; SOLID ELECTROLYTES; ELECTRICAL-PROPERTIES; DEFECT STRUCTURE; FUEL-CELLS; THIN-FILMS; PHASE; SYSTEM; IDENTIFICATION;

D O I：

10.1016/j.ssi.2013.11.015

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The di-substituted bismuth oxide based oxide ion conducting electrolyte system Bi-2.5 (+) xPb0.5YO5.75 (+) (3x / 2 -6) (X = 0, 1 and 2) has been investigated by X-ray powder diffraction, a.c. impedance spectroscopy, thermal analysis and X-ray photoelectron spectroscopy. delta-Bi2O3 type phases are observed for all compositions studied and showed no obvious changes in structure up to 850 degrees C. XPS results show an increasing trend in binding energy with increasing x-value. Results from thermal analysis and the thermal variation of the lattice parameter indicate a small degree of reduction occurs at high temperature, which is preserved on quenching. This reduction is reversed on heating at intermediate temperatures. The redox reactions appear to be correlated to a degree of curvature in the Arrhenius plot of conductivity. Measurement of transference numbers indicates that these materials are predominantly ionic conductors, with conductivity values at high temperature comparable with mono-substituted analogues. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：59 / 64

页数：6

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